In the Instant Payment Notification URL of the API form V1, V2 section, specify the URL of your page in the fields URL to notify in TEST mode and URL to notify in PRODUCTION modeif you wish to receive notifications in the form API format.

In the REST API Instant Payment Notification URL section, specify the URL of your page in the fields Target URL of the IPN to notify in TEST mode and Target URL of the IPN to notify in PRODUCTION mode if you are using the JavaScript client.

Save the changes.

Right-click Instant Payment Notification URL on an operation coming from the Back Office and select Enable the rule to enable the rule.